From 0dc342de848a642ecce8db697b8fecd83a63e117 Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 25 Aug 2008 15:02:05 +0000
Subject: added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 trunk/ext/digest/lib/digest.rb | 50 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 trunk/ext/digest/lib/digest.rb

(limited to 'trunk/ext/digest/lib/digest.rb')

diff --git a/trunk/ext/digest/lib/digest.rb b/trunk/ext/digest/lib/digest.rb
new file mode 100644
index 0000000000..0c4ee3c2cc
--- /dev/null
+++ b/trunk/ext/digest/lib/digest.rb
@@ -0,0 +1,50 @@
+require 'digest.so'
+
+module Digest
+  def self.const_missing(name)
+    case name
+    when :SHA256, :SHA384, :SHA512
+      lib = 'digest/sha2.so'
+    else
+      lib = File.join('digest', name.to_s.downcase)
+    end
+
+    begin
+      require lib
+    rescue LoadError => e
+      raise LoadError, "library not found for class Digest::#{name} -- #{lib}", caller(1)
+    end
+    unless Digest.const_defined?(name)
+      raise NameError, "uninitialized constant Digest::#{name}", caller(1)
+    end
+    Digest.const_get(name)
+  end
+
+  class ::Digest::Class
+    # creates a digest object and reads a given file, _name_.
+    # 
+    #  p Digest::SHA256.file("X11R6.8.2-src.tar.bz2").hexdigest
+    #  # => "f02e3c85572dc9ad7cb77c2a638e3be24cc1b5bea9fdbb0b0299c9668475c534"
+    def self.file(name)
+      new.file(name)
+    end
+  end
+
+  module Instance
+    # updates the digest with the contents of a given file _name_ and
+    # returns self.
+    def file(name)
+      File.open(name, "rb") {|f|
+        buf = ""
+        while f.read(16384, buf)
+          update buf
+        end
+      }
+      self
+    end
+  end
+end
+
+def Digest(name)
+  Digest.const_get(name)
+end
-- 
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